Question

Open the Remove Water Valve (on the lower right) until there is ½ a liter of solution in the beaker. 10. What happened to the concentration when ½ of the solution was allowed to run out? (Explain why in terms of the amount of solute and solvent) The concentration does not change this is because the quantity of solute, quantity of water decreased simultaneously. The amount of solute decreased by half i.e moles remaining = 0.25/2 = 0.125 moles and amount of water remaining = 1/2 litre. M = 0.125/0.5 = 0.25M. 11. From the concentration & Volume calculate the number of moles of solute in the solution. Show your calculation with units. M = 0.25M, V = 0.5L n. of moles = 0.25 (moles/litre) x 0.5 litre => 0.125 moles 12. How does the # moles of solute compare to the # of moles of solute calculated in question 1. Explain why these numbers compare as they do. 13. Predict the concentration if the solution is diluted to a volume of 1 liter. Show the calculation of this concentration, include units in all your work. concentration of if Volume is diluted to the volume of 1 litre. then, let concentration said as M. M1V1 = M2.1/2 0.50 x 1/2 = M x 1 => M = 0.25 M So, concentration will become 0.25 M. After you make the calculation: Add water with the valve in the upper left until there is 1 liter of water in the beaker . 14. What is the concentration? 0.25 M Does this match your calculation? Yes or No After add 1 litre of water in 0.50 M of 500 mL of solution the final concentration become 0.25 M. So, the new concentration of solution = 0.25 M. yes this is match with the given calculation SUMMARY OF LEARNING OBJECTIVES Adding solute (solid) to an unsaturated solution causes the concentration of the solution to: INCREASE/DECREASE/ REMAIN UNCHANGED. Adding pure water to a saturated solution will cause the concentration of the solution to: INCREASE /DECREASE/ REMAIN UNCHANGED. Adding a solid salt to a saturated solution cases the concentration of the solution to: INCREASE /DECREASE/ REMAIN UNCHANGED. Evaporation acting on an unsaturated solution causes the concentration of the solution to: INCREASE /DECREASE/ REMAIN UNCHANGED Evaporation acting on a saturated solution causes the concentration of the solution to: INCREASE /DECREASE/ REMAIN UNCHANGED.

Open the Remove Water Valve (on the lower right) until there is ½ a liter of solution in the beaker.
10. What happened to the concentration when ½ of the solution was allowed to run out? (Explain why in terms of the amount of solute and solvent)
The concentration does not change this is because the quantity of solute, quantity of water decreased simultaneously. The amount of solute decreased by half i.e moles remaining = 0.25/2 = 0.125 moles and amount of water remaining = 1/2 litre. M = 0.125/0.5 = 0.25M.
11. From the concentration & Volume calculate the number of moles of solute in the solution. Show your calculation with units.
M = 0.25M, V = 0.5L
n. of moles = 0.25 (moles/litre) x 0.5 litre => 0.125 moles
12. How does the # moles of solute compare to the # of moles of solute calculated in question 1. Explain why these numbers compare as they do.
13. Predict the concentration if the solution is diluted to a volume of 1 liter. Show the calculation of this concentration, include units in all your work.
concentration of if Volume is diluted to the volume of 1 litre. then, let concentration said as M.
M1V1 = M2.1/2 0.50 x 1/2 = M x 1 => M = 0.25 M
So, concentration will become 0.25 M.
After you make the calculation: Add water with the valve in the upper left until there is 1 liter of water in the beaker .
14. What is the concentration? 0.25 M Does this match your calculation? Yes or No
After add 1 litre of water in 0.50 M of 500 mL of solution the final concentration become 0.25 M. So, the new concentration of solution = 0.25 M. yes this is match with the given calculation
SUMMARY OF LEARNING OBJECTIVES
Adding solute (solid) to an unsaturated solution causes the concentration of the solution to:
INCREASE/DECREASE/ REMAIN UNCHANGED.
Adding pure water to a saturated solution will cause the concentration of the solution to:
INCREASE /DECREASE/ REMAIN UNCHANGED.
Adding a solid salt to a saturated solution cases the concentration of the solution to:
INCREASE /DECREASE/ REMAIN UNCHANGED.
Evaporation acting on an unsaturated solution causes the concentration of the solution to:
INCREASE /DECREASE/ REMAIN UNCHANGED
Evaporation acting on a saturated solution causes the concentration of the solution to:
INCREASE /DECREASE/ REMAIN UNCHANGED.

Added by Rocio W.

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